CN107710828B - Method and device for determining central frequency point of carrier - Google Patents
Method and device for determining central frequency point of carrier Download PDFInfo
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- CN107710828B CN107710828B CN201680033261.0A CN201680033261A CN107710828B CN 107710828 B CN107710828 B CN 107710828B CN 201680033261 A CN201680033261 A CN 201680033261A CN 107710828 B CN107710828 B CN 107710828B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2657—Carrier synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2211/00—Orthogonal indexing scheme relating to orthogonal multiplex systems
- H04J2211/003—Orthogonal indexing scheme relating to orthogonal multiplex systems within particular systems or standards
- H04J2211/005—Long term evolution [LTE]
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention relates to the field of mobile communication, in particular to a technology for determining a carrier central frequency point in a wireless communication system. In the method for determining the central frequency point of the carrier, the central frequency point of the carrier for communication between a base station and UE is determined according to a frequency band starting frequency point, an absolute radio frequency channel number, a frequency band offset and a relative radio frequency channel number. By the scheme, the time for the terminal to search the cell can be shortened, the power consumption of the terminal is reduced, and the service life of the battery is prolonged.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a method and a device for determining a carrier central frequency point.
Background
The Internet of things (IOT) is "Internet with connected objects", which extends the user end of the Internet to any object for information exchange and communication. Such a communication method is also called Machine Type Communications (MTC), and a communication node thereof is called an MTC terminal. Typical applications of the internet of things include intelligent meter reading, intelligent home furnishing and the like. Because the internet of things needs to be applied to various scenes, such as outdoor environments, indoor environments, underground environments and the like, a plurality of special requirements are provided for the design of the internet of things.
First, the internet of things is required to have strong coverage performance. Many MTC devices are in poor coverage environments, such as electric meters, water meters, etc., and they are usually installed in indoor corners or even basements, etc., where wireless network signals are poor, and this time, a coverage enhancement technology is needed to achieve coverage of the internet of things.
Second, the internet of things is required to support a large number of low-rate devices. The number of the MTC devices is far larger than that of the devices for communication between people, but the data packets transmitted by the MTC devices are small and insensitive to delay.
Third, the cost of the internet of things equipment needs to be very low. Many MTC applications require MTC devices to be available and used at very low cost to enable large-scale deployment.
Fourth, the internet of things equipment is required to have low energy consumption. In most cases, MTC devices are powered by batteries. However, in many scenarios, MTC is required to be able to operate for more than ten years without the need to replace batteries, which requires MTC devices to be able to operate with extremely low power consumption.
The desired low cost, large coverage, low energy consumption goals have not been achieved to date. To meet these special requirements, three deployment modes are defined in the recent Narrow-Band Internet of Things (NB-IOT) topic:
(1) Independent band operation (standby operation): i.e. using an independent frequency band, such as one or more carriers of a Global System for Mobile communication (GSM) network.
(2) In-band operation (In-band operation): utilize one or more Physical Resource Blocks (PRBs) within a Long Term Evolution (LTE) carrier.
(3) Guard band operation (guard band operation): and utilizing the resource blocks which are not utilized in the LTE carrier guard band.
In the above three modes, the carrier center frequency point positions for deploying NB-IoT may be different and may not be consistent with the carrier center frequency points defined based on the 100kHz grid originally in LTE. And the terminal does not know where the NB-IoT system is deployed when accessing the network, let alone which deployment mode is specific. Therefore, because the carrier center is not consistent with the original carrier center of the LTE during the NB-IOT in-band operation and the guard band operation, if the terminal continues to search for the NB-IOT cell using the carrier center defined by the LTE at this time, the terminal may not be able to search for the cell, frequent cell search is very power consuming, and is not favorable for the battery life of the NB-IOT terminal.
Disclosure of Invention
The embodiment of the invention provides a method and a device for determining a carrier central frequency point, which are used for realizing the carrier central frequency point suitable for NB-IoT.
On one hand, the embodiment of the application provides a method for determining a carrier central frequency point, which is applied to an NB-IoT system and used for determining a frequency band starting frequency point, an absolute radio frequency channel number and a frequency band offset; and determining the central frequency point of the carrier according to the determined frequency band starting frequency point, the absolute radio frequency channel number and the frequency band offset.
In one possible design, the center frequency point F of the carrier wave NB DL Determining the central frequency point of the carrier according to the determined frequency band starting frequency point, the absolute radio frequency channel number and the frequency band offset, wherein the central frequency point of the downlink carrier comprises the following steps:
F NB DL ＝F NB DL_low +0.0025*(N NB DL -N NB Offs-DL )；
wherein, F is NB DL_low Is the frequency point of the downlink frequency band of the frequency band, N NB Offs-DL Is the frequency band downlink offset, N NB Offs-DL The value of (2) is the frequency band downlink offset N of the LTE system Offs-DL 40 times of said N NB DL For the downlink absolute radio frequency channel number, N NB DL Has a value range of [ min 40, (max + 1) 40-1%]The [ min, max ] of]Absolute radio frequency channel number N for LTE system DL The value range of (a).
In one possible design, the method further includes determining a relative radio frequency channel number; the determining the central frequency point of the carrier wave comprises the following steps:
F NB DL ＝F DL_low +0.1*(N DL -N Offs-DL )+0.0025*M DL ，
wherein，M DL For the downlink relative radio frequency channel number, the value range thereof includes any one of the following sets: -20, -19, -18, -17, -16, -15, -14, -13, -12, -11, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6,7,8,9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19.
In one possible design, the center frequency point F of the carrier wave NB DL Determining the central frequency point of the carrier according to the determined frequency band starting frequency point, the absolute radio frequency channel number and the frequency band offset, wherein the determining the central frequency point of the carrier is the central frequency point of the downlink carrier, and comprises the following steps:
F NB DL ＝F NB DL_low +0.0025*((2*N NB DL +1)-N NB Offs-DL )；
wherein, F is NB DL_low For the starting frequency point of the frequency band downlink frequency band, N NB Offs-DL Is the frequency band downlink offset, N NB Offs-DL The value of (2) is the frequency band downlink offset N of the LTE system Offs-DL 40 times of, N NB DL Is the downlink absolute radio frequency channel number, N NB DL Has a value range of [ min 20, (max + 1) 20-1%]The [ min, max ] of]Absolute radio frequency channel number N for LTE system DL The value range of (a).
In one possible design, determining the relative radio frequency channel number M is also included DL (ii) a The determining the central frequency point of the carrier wave comprises the following steps:
F NB DL ＝F DL_low +0.1*(N DL -N Offs-DL )+0.0025*(2M DL +1)；
wherein M is DL For the downlink relative radio frequency channel number, the value range thereof includes any one of the following sets: -10, -9, -8, -7, -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6,7,8,9.
In one possible design, the center frequency point F of the carrier wave NB UL Is the central frequency point of the uplink carrier, and according to the determined frequency band initial frequency point,determining the central frequency point of the carrier by the absolute radio frequency channel number and the frequency band offset, comprising the following steps:
F NB UL ＝F NB UL_low +0.0025*(N NB UL -N NB Offs-UL )；
wherein, F is NB UL_low Is the frequency band uplink frequency band initial frequency point, N NB Offs-UL For the frequency band uplink offset, N NB Offs-UL The value of (2) is the frequency band uplink offset N of the LTE system Offs-UL 40 times of, N NB UL For the uplink Absolute radio frequency channel number, N NB UL Has a value range of [ min 40, (max + 1) 40-1%]The [ min, max ] of]Absolute radio frequency channel number N for LTE system DL The value range of (a).
In one possible design, the method further includes determining a relative radio frequency channel number; the determining the central frequency point of the carrier wave comprises the following steps:
F NB UL ＝F UL_low +0.1*(N UL -N Offs-UL )+0.0025*M UL ；
wherein M is UL The uplink relative radio frequency channel number is in a value range including any one of the following sets: -20, -19, -18, -17, -16, -15, -14, -13, -12, -11, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6,7,8,9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19.
In one possible design, the center frequency point F of the carrier wave NB UL Determining the central frequency point of the carrier according to the determined frequency band starting frequency point, the absolute radio frequency channel number and the frequency band offset, wherein the central frequency point of the uplink carrier comprises the following steps:
F NB UL ＝F NB UL_low +0.0025*(2*N NB UL -N NB Offs-UL )；
wherein, F is NB UL_low Is the frequency band uplink frequency band initial frequency point, N NB Offs-UL Which is the uplink offset of the frequency band,said N is NB Offs-UL The value of (2) is the frequency band uplink offset N of the LTE system Offs-UL 40 times of that of, N NB UL Is the uplink absolute radio frequency channel number, N NB UL Has a value range of [ min 20, (max + 1) 20-1%]The [ min, max ] of]Absolute radio frequency channel number N for LTE system UL The value range of (a).
In one possible design, determining the relative radio frequency channel number M is further included UL (ii) a The determining the central frequency point of the carrier wave comprises the following steps:
F NB UL ＝F UL_low +0.1*(N UL -N Offs-UL )+0.0025*(2M UL )；
wherein M is UL The uplink relative radio frequency channel number is in a value range including any one of the following sets: -10, -9, -8, -7, -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6,7,8,9.
On the other hand, an embodiment of the present invention provides a base station, where the base station has a function of implementing a base station behavior in the foregoing method. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions.
In one possible design, the base station may have a structure including a processor and a transmitter, and the processor may be configured to support the base station to perform the corresponding functions of the method described above. The transmitter is configured to support communication between the base station and the UE, and to send information or instructions related to the method to the UE. The base station may also include a memory, coupled to the processor, that stores program instructions and data necessary for the base station.
In another aspect, an embodiment of the present invention provides a UE, where the UE has a function of implementing UE behavior in the above method design. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. The modules may be software and/or hardware.
In one possible design, the UE structure includes a receiver and a processor, where the receiver is configured to support the UE to receive various instructions, such as a first DRX long cycle, a second DRX long cycle, a DRX activation indication, or a DRX deactivation indication configured by the base station for the UE. And the processor controls the UE to deactivate the DRX indication or receive paging in a second DRX long cycle according to the first DRX long cycle received by the receiver.
Compared with the prior art, the scheme provided by the invention can realize three deployment modes aiming at NB-IoT, reduce the time for a terminal to search a cell, reduce the power consumption of the terminal and prolong the service life of a battery.
Drawings
Fig. 1 is a schematic flowchart of a possible process for determining a carrier center frequency point according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a base station according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a UE according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The network architecture and the service scenario described in the embodiment of the present invention are for more clearly illustrating the technical solution of the embodiment of the present invention, and do not form a limitation on the technical solution provided in the embodiment of the present invention, and it can be known by those skilled in the art that the technical solution provided in the embodiment of the present invention is also applicable to similar technical problems along with the evolution of the network architecture and the appearance of a new service scenario.
In this application, the terms "network" and "system" are often used interchangeably, but those skilled in the art will understand their meaning. The UE referred to in this application may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem with wireless communication functions, and various forms of User Equipment (UE), mobile Stations (MS), terminals (Terminal), terminal devices (Terminal Equipment), and so on. For convenience of description, the above-mentioned devices are collectively referred to as user equipment or UE in this application. The Base Station (BS) related to the present invention is a device deployed in a radio access network to provide a wireless communication function for a UE. The base stations may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different radio access technologies, the names of devices with base station functions may be different, for example, in an LTE network, referred to as an evolved Node B (eNB or eNodeB), in a third generation 3G network, referred to as a Node B (Node B), and so on. For convenience of description, the above-mentioned apparatus for providing the UE with the wireless communication function is collectively referred to as a base station or BS in this application.
Fig. 1 shows a method for determining a carrier center frequency point according to an embodiment of the present invention, which is applied to an NB-IoT system, and a preferred embodiment of the present invention is described in detail below with reference to fig. 1.
S101, determining a frequency band starting frequency point, an absolute radio frequency channel number and a frequency band offset;
and S102, determining the central frequency point of the carrier according to the determined frequency band starting frequency point, the absolute radio frequency channel number and the frequency band offset.
Specifically, the embodiment of the present invention provides several alternative ways to determine the center frequency point of the downlink carrier.
One possible way to determine the center frequency point of the downlink carrier is as follows:
F NB DL ＝F NB DL_low +0.0025*(N NB DL -N NB Offs-DL )；
wherein, F is NB DL_low For frequency band downlink band initiationFrequency points, channel frequency grid of 0.0025 (MHz), N NB Offs-DL Is the frequency band downlink offset, N NB Offs-DL The value of (2) is the frequency band downlink offset N of the LTE system Offs-DL 40 times of that of, N NB DL For the downlink absolute radio frequency channel number, N NB DL Has a value range of [ min 40, (max + 1) 40-1%]The [ min, max ] of]Absolute radio frequency channel number N for LTE system DL The value range of (a). N is a radical of hydrogen DL Is an ARFCN for NB-IOT. In detail, the values of the parameters on the right side of the above equation are referred to table 1.
TABLE 1
Optionally, another possible way to determine the center frequency point of the downlink carrier is as follows:
F NB DL ＝F DL_low +0.1*(N DL -N Offs-DL )+0.0025*M DL ，
wherein, M DL The value range of the downlink relative radio frequency channel number comprises any one of the following sets: -20, -19, -18, -17, -16, -15, -14, -13, -12, -11, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6,7,8,9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19. The channel frequency grid is 0.0025 (MHz).
Optionally, another possible way to determine the center frequency point of the downlink carrier is as follows:
F NB DL ＝F NB DL_low +0.0025*((2*N NB DL +1)-N NB Offs-DL )；
wherein, F is NB DL_low For the starting frequency point of the frequency band downlink frequency band, N NB Offs-DL Is the frequency band downlink offset, N NB Offs-DL The value of (2) is the frequency band downlink offset N of the LTE system Offs-DL 40 times of that of, N NB DL For the downlink absolute radio frequency channel numberSaid N is NB DL Has a value range of [ min 20, (max + 1) 20-1%]The [ min, max ] of]Absolute radio frequency channel number N for LTE system DL The value range of (a). In detail, the values of the parameters on the right side of the above equation are referred to table 2.
Downlink carrier central frequency point F determined by the mode NB DL The subset of center frequency points determined in this manner includes the odd-numbered times of the channel frequency grid.
TABLE 2
Optionally, another possible way to determine the center frequency point of the downlink carrier is as follows:
F NB DL ＝F DL_low +0.1*(N DL -N Offs-DL )+0.0025*(2M DL +1)；
wherein M is DL The value range of the downlink relative radio frequency channel number comprises any one of the following sets: -10, -9, -8, -7, -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6,7,8,9.
Downlink carrier central frequency point F determined by the method NB DL The subset of the central frequency points determined in the above manner includes an odd multiple of the channel frequency grid, or an integer multiple of 0.1MHz of the LTE channel grid.
The embodiment of the invention also provides several optional modes for determining the central frequency point of the uplink carrier.
One possible way to determine the central frequency point of the uplink carrier is as follows:
F NB UL ＝F NB UL_low +0.0025*(N NB UL -N NB Offs-UL )；
wherein, the F NB UL_low Is the frequency band uplink frequency band initial frequency point, N NB Offs-UL For the frequency band uplink offset, N NB Offs-UL Is uplink of the frequency band of the LTE systemOffset N Offs-UL 40 times of, N NB UL For the uplink Absolute radio frequency channel number, N NB UL Has a value range of [ min 40, (max + 1) 40-1%]The [ min, max ] of]Absolute radio frequency channel number N for LTE system DL The value range of (a). N is a radical of UL Is the ARFCN of NB-IOT, the values of the parameters on the right of the above equation are referred to in Table 3.
TABLE 3
Optionally, another possible way to determine the central frequency point of the uplink carrier is as follows:
F NB UL ＝F UL_low +0.1*(N UL -N Offs-UL )+0.0025*M UL ；
wherein, M UL The value range of the uplink relative radio frequency channel number comprises any one of the following sets: -20, -19, -18, -17, -16, -15, -14, -13, -12, -11, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6,7,8,9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19;
N DL and N UL ARFCN value of NB-IOT is the same as LTE, N Offs-DL And N Offs-UL The values are same as LTE, M DL And M UL For the added parameter, it can be defined as RRFCN (relative RFCN), and the value range is as shown above.
Optionally, another possible way to determine the central frequency point of the uplink carrier is as follows:
F NB UL ＝F NB UL_low +0.0025*(2*N NB UL -N NB Offs-UL )；
wherein, the F NB UL_low Is the frequency band uplink frequency band initial frequency point, N NB Offs-UL For the frequency band uplink offset, N NB Offs-UL The value of (2) is the frequency band uplink offset N of the LTE system Offs-UL 40 times of, N NB UL Is the uplink absolute radio frequency channel number, N NB UL Has a value range of [ min 20, (max + 1) 20-1%]The [ min, max ] of]Absolute radio frequency channel number N for LTE system UL The value range of (a). In detail, the values of the parameters on the right side of the above equation are referred to in table 3.
TABLE 4
Uplink carrier central frequency point F determined by the method NB UL The subset of center frequency points determined in this manner includes an even multiple of the channel frequency grid.
Optionally, another possible way to determine the central frequency point of the uplink carrier is as follows:
F NB UL ＝F UL_low +0.1*(N UL -N Offs-UL )+0.0025*(2M UL )；
wherein, M UL The value range of the uplink relative radio frequency channel number comprises any one of the following sets: -10, -9, -8, -7, -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6,7,8,9. Uplink carrier central frequency point F determined by the method NB UL The subset of center frequency points determined in the above manner includes an even multiple of the channel frequency grid.
Fig. 2 shows a schematic diagram of a possible structure of the base station involved in the above embodiment.
The base station comprises a transmitter/receiver 1001, a controller/processor 1002, a memory 1003 and a communication unit 1004. The transmitter/receiver 1001 is used to support information transceiving between a base station and the UE described in the above embodiments, and to support radio communication between the UE and other UEs. The controller/processor 1002 performs various functions for communicating with the UEs. In the uplink, uplink signals from the UE are received via the antenna, conditioned by the receiver 1001, and further processed by the controller/processor 1102 to recover traffic data and signaling information sent by the UE. On the downlink, traffic data and signaling messages are processed by a controller/processor 1002 and conditioned by a transmitter 1001 to generate a downlink signal, which is transmitted via an antenna to the UEs. Controller/processor 1002 may also perform base station related processes in embodiments of the invention and/or other processes for the techniques described herein. A memory 1003 is used to store program codes and data for the base stations. The communication unit 1004 is used to support the base station to communicate with other network entities. For example, for supporting communication between the base station and other communication network entities shown in fig. 2, such as an MME located in a core network EPC, an SGW and/or a PGW.
It will be appreciated that fig. 3 only shows a simplified design of the base station. In practice, the base station may comprise any number of transmitters, receivers, processors, controllers, memories, communication units, etc., and all base stations that can implement the present invention are within the scope of the present invention.
Fig. 3 shows a simplified schematic diagram of a possible design structure of the UE involved in the above embodiments. The UE includes a transmitter 1101, a receiver 1102, a controller/processor 1103, a memory 1104 and a modem processor 1105.
The transmitter 1101 conditions (e.g., converts to analog, filters, amplifies, and frequency upconverts, etc.) the output samples and generates an uplink signal, which is transmitted via an antenna to the base station as described in the embodiments above. On the downlink, the antenna receives the downlink signal transmitted by the base station in the above embodiment. Receiver 1102 conditions (e.g., filters, amplifies, downconverts, and digitizes, etc.) the received signal from the antenna and provides input samples. In modem processor 1105, an encoder 1106 receives traffic data and signaling messages to be transmitted on the uplink and processes (e.g., formats, encodes, and interleaves) the traffic data and signaling messages. A modulator 1107 further processes (e.g., symbol maps and modulates) the encoded traffic data and signaling messages and provides output samples. A demodulator 1109 processes (e.g., demodulates) the input samples and provides symbol estimates. A decoder 1108 processes (e.g., deinterleaves and decodes) the symbol estimates and provides decoded data and signaling messages for transmission to the UE. Encoder 1106, modulator 1107, demodulator 1109, and decoder 1108 may be implemented by a combined modem processor 1105. These elements are handled according to the radio access technology employed by the radio access network (e.g., the access technology of LTE and other evolved systems).
The method and the device are based on the same inventive concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not described again.
It should be noted that, the division of the modules in the embodiments of the present invention is schematic, and is only a logical function division, and in actual implementation, there may be another division manner, and in addition, each functional module in each embodiment of the present application may be integrated in one processing module, or each module may exist alone physically, or two or more modules are integrated in one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.
The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (21)
1. A method for determining a carrier center frequency point is applied to an NB-IoT system, and is characterized by comprising the following steps:
determining a downlink frequency band starting frequency point, a downlink absolute radio frequency channel number, a downlink frequency band offset and a downlink relative radio frequency channel number;
determining a central frequency point F of a downlink carrier according to the downlink frequency band starting frequency point, the downlink absolute radio frequency channel number, the downlink frequency band offset and the downlink relative radio frequency channel number NB DL ，
F NB DL ＝F DL_low +0.1*(N DL –N Offs-DL )+0.0025*(2M DL +1)；
Wherein, F DL_low For the start frequency point of the downlink frequency band, N DL Is the downlink absolute radio frequency channel number, N Offs-DL For the offset of the downlink frequency band, the offset is,
M DL and taking the value of the downlink relative radio frequency channel number to include any one of the following numerical values: -10, -9, -8, -7, -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6,7,8,9;
according to the central frequency point F NB DL And transmitting or receiving a signal.
2. The method of claim 1, wherein the frequency points F are determined according to the center frequency point NB DL Transmitting or receiving a signal, comprising:
when the method is executed by user equipment, according to the central frequency point F NB DL Receiving a signal; or the like, or, alternatively,
when the method is executed by a base station, according to the central frequency point F NB DL And sending the signal.
3. The method of claim 1 or 2, wherein a deployment mode employed by the NB-IoT system is one of independent band operation, in-band operation, or guardband operation.
4. A method for determining a carrier center frequency point is applied to an NB-IoT system, and is characterized by comprising the following steps:
determining an uplink frequency band starting frequency point, an uplink absolute radio frequency channel number, an uplink frequency band offset and an uplink relative radio frequency channel number;
determining a central frequency point F of an uplink carrier according to the uplink frequency band initial frequency point, the uplink absolute radio frequency channel number, the uplink frequency band offset and the uplink relative radio frequency channel number NB UL ，
F NB UL ＝F UL_low +0.1*(N UL –N Offs-UL )+0.0025*(2M UL )；
Wherein, F UL_low Is the starting frequency point of the uplink frequency band, N UL Is the uplink absolute radio frequency channel number, N Offs-UL The offset is the uplink frequency band offset;
M UL and taking the uplink relative radio frequency channel number to any one of the following values: -10, -9, -8, -7, -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6,7,8,9;
according to the central frequency point F NB UL And transmitting or receiving a signal.
5. The method of claim 4, wherein the signal is based on the center frequencyPoint F NB UL Transmitting or receiving a signal, comprising:
when the method is executed by user equipment, according to the central frequency point F NB UL Sending a signal; or the like, or, alternatively,
when the method is executed by a base station, according to the central frequency point F NB UL And receiving the signal.
6. The method of claim 4 or 5, wherein a deployment mode employed by the NB-IoT system is one of independent band operation, in-band operation, or guard-band operation.
7. An apparatus applied in an NB-IoT system, comprising:
a unit for determining a downlink frequency band start frequency point, a downlink absolute radio frequency channel number, a downlink frequency band offset and a downlink relative radio frequency channel number;
is used for determining the central frequency point F of the downlink carrier according to the downlink frequency band starting frequency point, the downlink absolute radio frequency channel number, the downlink frequency band offset and the downlink relative radio frequency channel number NB DL The unit (b) of (a) is,
F NB DL ＝F DL_low +0.1*(N DL –N Offs-DL )+0.0025*(2M DL +1)；
wherein, F DL_low For the start frequency point of the downlink frequency band, N DL Is the downlink absolute radio frequency channel number, N Offs-DL For the offset of the downlink frequency band, the offset is,
M DL the value of the downlink relative radio frequency channel number comprises any one of the following values: -10, -9, -8, -7, -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6,7,8,9;
is used for according to the central frequency point F NB DL A unit that transmits or receives a signal.
8. The apparatus of claim 7,
the device is user equipment and is used for transmitting the center frequency point F NB DL A unit for transmitting or receiving a signal, comprising:
is used for according to the central frequency point F NB DL A unit for receiving a signal; or the like, or, alternatively,
the device is a base station and is used for transmitting the center frequency point F NB DL A unit for transmitting or receiving a signal, comprising:
is used for according to the central frequency point F NB DL And a unit for transmitting the signal.
9. The apparatus of claim 7 or 8, the deployment mode employed by the NB-IoT system is one of independent band operation, in-band operation, or guardband operation.
10. An apparatus applied in an NB-IoT system, comprising:
a unit for determining an uplink frequency band starting frequency point, an uplink absolute radio frequency channel number, an uplink frequency band offset and an uplink relative radio frequency channel number;
a central frequency point F for determining the uplink carrier according to the uplink frequency band initial frequency point, the uplink absolute radio frequency channel number, the uplink frequency band offset and the uplink relative radio frequency channel number NB UL The unit (c) of (a) is,
F NB UL ＝F UL_low +0.1*(N UL –N Offs-UL )+0.0025*(2M UL )；
wherein, F UL_low Is the starting frequency point of the uplink frequency band, N UL Is the uplink absolute radio frequency channel number, N Offs-UL Is the uplink frequency band offset;
M UL the value of the uplink relative radio frequency channel number comprises any one of the following values: -10, -9, -8, -7, -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6,7,8,9;
is used for according to the central frequency point F NB UL A unit that transmits or receives a signal.
11. The apparatus of claim 10,
the device is user equipment and is used for transmitting the center frequency point F NB UL A unit for transmitting or receiving a signal, comprising:
is used for according to the central frequency point F NB UL A unit for transmitting a signal; or the like, or, alternatively,
the device is a base station and is used for transmitting the frequency point F according to the center frequency point NB UL A unit for transmitting or receiving a signal, comprising:
is used for according to the central frequency point F NB UL And a unit for receiving the signal.
12. The apparatus of claim 10 or 11, wherein a deployment mode employed by the NB-IoT system is one of independent band operation, in-band operation, or guardband operation.
13. A method for determining a carrier center frequency point is applied to an NB-IoT system, and is characterized by comprising the following steps:
a base station determines a downlink frequency band starting frequency point, a downlink absolute radio frequency channel number, a downlink frequency band offset and a downlink relative radio frequency channel number;
the base station determines the central frequency point F of the downlink carrier according to the downlink frequency band initial frequency point, the downlink absolute radio frequency channel number, the downlink frequency band offset and the downlink relative radio frequency channel number NB DL ，
F NB DL ＝F DL_low +0.1*(N DL –N Offs-DL )+0.0025*(2M DL +1)；
Wherein, F DL_low For the start frequency point of the downlink frequency band, N DL Is the downlink absolute radio frequency channel number, N Offs-DL For the offset of the downlink frequency band, the offset is,
M DL is a stand forThe value of the downlink relative radio frequency channel number comprises any one of the following values: -10, -9, -8, -7, -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6,7,8,9;
the base station is used for receiving the central frequency point F NB DL Sending a signal;
user equipment determines the downlink frequency band initial frequency point F DL_low The downlink absolute radio frequency channel number N DL The downlink frequency band offset N Offs-DL And the downlink relative radio frequency channel number M DL ；
The user equipment starts the frequency point F according to the downlink frequency band DL_low Said downlink absolute radio frequency channel number N DL The downlink frequency band offset N Offs-DL And the downlink relative radio frequency channel number M DL Determining the central frequency point F of the downlink carrier NB DL ，
F NB DL ＝F DL_low +0.1*(N DL –N Offs-DL )+0.0025*(2M DL +1)；
The user equipment is used for receiving the central frequency point F NB DL And receiving the signal.
14. The method of claim 13, the deployment mode employed by the NB-IoT system is one of independent band operation, in-band operation, or guardband operation.
15. A method for determining a carrier center frequency point is applied to an NB-IoT system, and is characterized by comprising the following steps:
the user equipment determines an uplink frequency band starting frequency point, an uplink absolute radio frequency channel number, an uplink frequency band offset and an uplink relative radio frequency channel number;
the user equipment determines a central frequency point F of an uplink carrier according to the uplink frequency band initial frequency point, the uplink absolute radio frequency channel number, the uplink frequency band offset and the uplink relative radio frequency channel number NB UL ，
F NB UL ＝F UL_low +0.1*(N UL –N Offs-UL )+0.0025*(2M UL )；
Wherein, F UL_low Is the starting frequency point of the uplink frequency band, N UL Is the uplink absolute radio frequency channel number, N Offs-UL Is the uplink frequency band offset;
M UL and taking the uplink relative radio frequency channel number to any one of the following values: -10, -9, -8, -7, -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6,7,8,9;
the user sends the central frequency point F NB UL Sending a signal;
the base station determines the initial frequency point F of the uplink frequency band UL_low Said uplink absolute radio frequency channel number N UL The uplink frequency band offset N Offs-UL And said upstream relative radio frequency channel number M UL ；
The base station starts the frequency point F according to the uplink frequency band UL_low Said uplink absolute radio frequency channel number N UL The uplink frequency band offset N Offs-UL And said upstream relative radio frequency channel number M UL Determining the central frequency point F of the uplink carrier NB UL ，
F NB UL ＝F UL_low +0.1*(N UL –N Offs-UL )+0.0025*(2M UL )；
The base station sends the central frequency point F NB UL And receiving the signal.
16. The method of claim 15, wherein a deployment mode employed by the NB-IoT system is one of independent band operation, in-band operation, or guardband operation.
17. An NB-IoT system, comprising;
a base station and a user equipment;
the base station is configured to:
determining a downlink frequency band starting frequency point, a downlink absolute radio frequency channel number, a downlink frequency band offset and a downlink relative radio frequency channel number;
determining a central frequency point F of a downlink carrier according to the downlink frequency band starting frequency point, the downlink absolute radio frequency channel number, the downlink frequency band offset and the downlink relative radio frequency channel number NB DL ，
F NB DL ＝F DL_low +0.1*(N DL –N Offs-DL )+0.0025*(2M DL +1)；
Wherein, F DL_low Is the initial frequency point of the downlink frequency band, N DL Is the downlink absolute radio frequency channel number, N Offs-DL For the offset of the downlink frequency band, the offset is,
M DL and taking the value of the downlink relative radio frequency channel number to include any one of the following numerical values: -10, -9, -8, -7, -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6,7,8,9;
according to the central frequency point F NB DL Sending a signal;
the user equipment is configured to:
determining the initial frequency point F of the downlink frequency band DL_low Said downlink absolute radio frequency channel number N DL The downlink frequency band offset N Offs-DL And downlink relative radio frequency channel number M DL ；
According to the downlink frequency band initial frequency point F DL_low The downlink absolute radio frequency channel number N DL The downlink frequency band offset N Offs-DL And said downlink relative radio frequency channel number M DL Determining the central frequency point F of the downlink carrier NB DL ，
F NB DL ＝F DL_low +0.1*(N DL –N Offs-DL )+0.0025*(2M DL +1)；
According to the central frequency point F NB DL And receiving the signal.
18. The system as in claim 17 wherein the deployment mode employed by the NB-IoT system is one of independent band operation, in-band operation or guardband operation.
19. An NB-IoT system, comprising;
a base station and a user equipment;
the user equipment is configured to:
determining an uplink frequency band initial frequency point, an uplink absolute radio frequency channel number, an uplink frequency band offset and an uplink relative radio frequency channel number;
determining a central frequency point F of an uplink carrier according to the uplink frequency band initial frequency point, the uplink absolute radio frequency channel number, the uplink frequency band offset and the uplink relative radio frequency channel number NB UL ，
F NB UL ＝F UL_low +0.1*(N UL –N Offs-UL )+0.0025*(2M UL )；
Wherein, F UL_low Is the starting frequency point of the uplink frequency band, N UL Is the uplink absolute radio frequency channel number, N Offs-UL Is the uplink frequency band offset;
M UL and taking the uplink relative radio frequency channel number to any one of the following values: -10, -9, -8, -7, -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6,7,8,9;
according to the central frequency point F NB UL Sending a signal;
the base station is configured to:
determining the initial frequency point F of the uplink frequency band UL_low Said uplink absolute radio frequency channel number N UL The uplink frequency band offset N Offs-UL And said upstream relative radio frequency channel number M UL ；
According to the uplink frequency band starting frequency point F UL_low The absolute radio frequency channel number N of the uplink UL The uplink frequency band offset N Offs-UL And said upstream relative radio frequency channel number M UL Determining the central frequency point F of the uplink carrier NB UL ，
F NB UL ＝F UL_low +0.1*(N UL –N Offs-UL )+0.0025*(2M UL )；
According to the central frequency point F NB UL And receiving the signal.
20. The system of claim 19, wherein a deployment mode employed by the NB-IoT system is one of independent band operation, in-band operation, or guardband operation.
21. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1-6.
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| PCT/CN2016/083806 WO2017075981A1 (en) | 2015-11-06 | 2016-05-28 | Method and apparatus for determining central frequency channel number of carrier |
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| ES2927293T3 (en) * | 2015-11-06 | 2022-11-04 | Huawei Tech Co Ltd | Method and apparatus for determining the center frequency of a carrier |
| US10278180B2 (en) | 2016-01-15 | 2019-04-30 | Qualcomm Incorporated | Raster design for narrowband operation for machine type communications |
| KR102528624B1 (en) * | 2019-04-12 | 2023-05-04 | 삼성전자 주식회사 | A method and an apparatus for determining a local frequency in wireless communication system |
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| CN108632956A (en) | 2018-10-09 |
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